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| author | Srinivas Ramana <sramana@codeaurora.org> | 2018-02-06 21:10:15 +0530 |
|---|---|---|
| committer | Gerrit - the friendly Code Review server <code-review@localhost> | 2018-02-08 01:50:16 -0800 |
| commit | 21393ff3eaf2003d0417f1c89ef8fadb315aabe2 (patch) | |
| tree | 7f3642c55c8a226783a7487bd93161260f5b3a20 /lib/flex_array.c | |
| parent | f62d97e9b43477194b4476aaa11cb1538e69057e (diff) | |
arm64: Add BTAC/LinkStack sanitizations for Kryo cores
Kryo cores are exposed to two vulnerabilities due to subroutine return
(called LINK-STACK) and branch target predictors.
These two issues can be mitigated through software workarounds.
Kernel:
- Apply LINK-STACK mitigation which is to issue 16 nested BL instructions
on process context switch 'cpu_do_switch_mm()' where ASID changes.
- Apply psci based branch predictor invalidation.
use the kryo core detection routine (based on MIDR) from the
commit bb48711800e6d ("arm64: cpu_errata: Add Kryo to Falkor 1003 errata")
by Stephen Boyd <sboyd@codeaurora.org>.
Change-Id: I81e8e72e7fa219f12dfe8ec39836eb8eb3c4c7b0
Signed-off-by: Srinivas Ramana <sramana@codeaurora.org>
Diffstat (limited to 'lib/flex_array.c')
0 files changed, 0 insertions, 0 deletions